diff -ruN ../moodle-1.7/grade/lib.php grade/lib.php
--- ../moodle-1.7/grade/lib.php 2006-11-30 13:48:58.000000000 +0000
+++ grade/lib.php       2006-11-30 13:48:03.000000000 +0000
@@ -2998,11 +2998,15 @@
 }
 
 function grade_get_course_students($courseid) {
-    global $CFG;
+    global $CFG, $USER;
     // The list of roles to display is stored in CFG->gradebookroles
     if (!$context = get_context_instance(CONTEXT_COURSE, $courseid)) {
         return false;  
     } 
+
+    if( ! has_capability('moodle/course:viewcoursegrades', $context) ){
+      return array($USER->id => $USER);
+    }
         
     $configvar = get_config('', 'gradebookroles');
     if (empty($configvar->value)) {